What is the difference between synchronous postback and asynchronous postback?

Posted on September-02-2014 12:00 AM

The difference between synchronous and asynchronous postback
is as follows:

Asynchronous postback renders only the required part of the
page; whereas, synchronous postback renders the entire page for any postback.

Asynchronous postback executes only one postback at a time,
that is, if you have two buttons doing asynchronous postback, the actions will
be performed one by one; whereas, synchronous postback executes all the actions
at once.